Shopping carts

Shopping carts

Andreas Rentz/Getty Images

The dirty details: A 2007 study by researchers at the University of Arizona found that nearly two-thirds of shopping carts tested were contaminated with fecal bacteria, and about 75 percent of them tested positive for E. coli. Stay clean: Swab the shopping cart handle with a disinfectant wipe...

The dirty details: A 2007 study by researchers at the University of Arizona found that nearly two-thirds of shopping carts tested were contaminated with fecal bacteria, and about 75 percent of them tested positive for E. coli. Stay clean: Swab the shopping cart handle with a disinfectant wipe... (Andreas Rentz/Getty Images)

The dirty details: A 2007 study by researchers at the University of Arizona found that nearly two-thirds of shopping carts tested were contaminated with fecal bacteria, and about 75 percent of them tested positive for E. coli. Stay clean: Swab the shopping cart handle with a disinfectant wipe...Andreas Rentz/Getty Images